Color-applying mechanism for printing-machines.



C. WINKLER.

COLOR APPLYING MECHANISM FOR PRINTING MACHINES.

APPHCATION FILED NOV-6. 1915.

Patented Apr. 3,1917.

CARL WINKLER, OF BERNE, SWITZERLAND.

COLOR-APPLYING MECHANISM FORPRINTING-MACI-IINES.

Specification of Letters Patent.

Patented Apr. 3, 1917.

Application filed November 6, 1915. Serial No. 59,966.

To all whom it may concern:

Be it known that I, CARL WINKLER, a citizen of the Swiss Republic, residing at Berne, in the Swiss Republic, have invented new and useful Improvements in Color-Applying Mechanism for Printing-Machines, of which the following is a specification.

Most inking and color applying devices for printing machines having two or more applying rolls have the disadvantage that the front applying roll only fulfils its function of applying ink or color to the form during the forward movement of said form, but not during its back stroke. This is accounted for by the fact that, in order to obtain a compact construction, the stroke of the form carriage is chosen as short as possible, so that the form only goes a short distance beyond the front ink or color applying roll. The steel roll transferring ink or color to said front applying roll is so arranged that this roll must describe at least half a revolution before the part to which fresh ink or color has been applied comes into contact with the form. The consequence is that said applying roll does not rotate sufficiently in order to apply ink or color to the whole of the form.

In order to overcome this drawback with out altering the construction of the machine the steel roll transferring fresh ink or colorhereinafter called color aloneto the front roll applying color to the form is arranged so far toward the front and downward toward the form that said front color applying roll only needs to rotate through a short distance in order to receive fresh color from said steel roll.

Figure l is a side elevation of the apparatus for applying color to the form of a printing machine: and

Fig. 2 shows the steel roll for applying color to the front color applying roll in front elevation.

In the drawing is shown the main parts of a printing machine in which the front color applying roll is provided with a rubbing roll arranged in accordance with the invention. The color is transferred from the trough a and roll 6 by the oscillating roll 0 to the roll d and passes then over the rolls 6, f and g to the steel roll it, which has such a position in regard to the color applying roll 71 that said roll 71 need only to turn through quite a small angle in order to bring the color applied to it by the roll 72. to the form 79, so that this form receives fresh color nearly during its entire return motion. The other color applying rolls z", 2' receive color in the usual way from a roll Z arranged at a higher point.

we is the paper carrying cylinder which can rotate backward and forward, or either continuously or intermittently in one direction.

The so called steel rolls, such as It, can of coulrse be made of any other suitable materia What I claim and desire to secure by Letters Patent of the United States is 2- In a printing machine, the combination of a reciprocating form, color rolls for applying color to the form, a rubbing roll adjacent the front color roll, a color trough, and rolls for transferring the color from the trough to the rubbing roll, said rub bing roll being arranged close to the form with its axis approximately in horizontal alinement with the axis of the front color roll, whereby fresh color will be so applied to the color applying roll that the said roll will have to turn but a short distance to apply the color to the form, thereby insuring the color being applied to the whole of the form.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL WINKLER.

Witnesses:

O. THURBAOH, M. BERTSCHINGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

